Visible Photoluminescence from Cubic (3C) Silicon Carbide Microdisks Coupled to High Quality Whispering Gallery Modes

• DOI: 10.1021/ph500384p
• Publication Date: 2014-12-18T19:30:35Z
• Authors: Marina Radulaski; Thomas M. Babinec; Kai Müller; Konstantinos G. L...; Jingyuan Linda Zhang; Sonia Buckley; Yousif A. Kelaita; Kassem Alassaad; Gabriel Ferro; Jelena Vučković
• Keywords: Quantum Physics; Condensed Matter - Mesoscale and Nanoscale Physics; FOS: Physical sciences; 02 engineering and technology; 01 natural sciences; 7. Clean energy; [SPI.MAT]Engineering Sciences [physics]/Materials; Mesoscale and Nanoscale Physics (cond-mat.mes-hall); 0103 physical sciences; [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci]; [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic; 0210 nano-technology; Quantum Physics (quant-ph); Physics - Optics; Optics (physics.optics)

We present the design, fabrication and characterization of cubic (3C) silicon carbide microdisk resonators with high quality factor modes at visible and near infrared wavelengths (600 - 950 nm). Whispering gallery modes with quality factors as high as 2,300 and corresponding mode volumes V ~ 2 (��/n)^3 are measured using laser scanning confocal microscopy at room temperature. We obtain excellent correspondence between transverse-magnetic (TM) and transverse-electric (TE) polarized resonances simulated using Finite Difference Time Domain (FDTD) method and those observed in experiment. These structures based on ensembles of optically active impurities in 3C-SiC resonators could play an important role in diverse applications of nonlinear and quantum photonics, including low power optical switching and quantum memories.<br/>11 pages, 5 figures<br/>